Reporting
We wonder if apples have more

We wonder if apples have more diseases than any other crop. If the spots on the leaves are yellow-brown and small, it might be Cedar Apple Rust. Golden Delicious is especially susceptible.  There are two ways to deal with this issue: 1) plant varieties resistant to cedar apple rust and 2)  spray protective fungicides in early spring, such as myclobutanil (Immunox).
First things first: Bring a sample to a tree nursery or your cooperative extension to get a real diagnosis.